OET Bulletin 65 of the FCC covers radiation hazards and limits for US
transmitting stations, including amateur radio. The bulletin is available
on line as a PDF file at the link below.
http://www.fcc.gov/Bureaus/Engineeri.../bulletins/oet
65/oet65.pdf
Pages 15-18 describe amateur radio requirements.
RF
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Pile of unfounded bullsheet! Biggest crock with ARRL saupport.
When you get to UHF and microwaves, Yes, there is the problem, mainly due to
heating effect.
But up 30 MHz, just ask any of the 90 year old OF hams and broadcast engineers
that lived their lives in the RF fields. Most of them lead active life, free of
cancer (unless they smoked it in).
Yuri